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alex41 [277]
2 years ago
9

The doppler effect is when objects are not moving? True False

Physics
1 answer:
SVETLANKA909090 [29]2 years ago
6 0

Answer:

reviewing the statement we can say that it is FALSE

Explanation:

The Doppler effect is the change in the perceived frequency of a sound wave by the RELATIVE MOTION of the source and the observer.

This effect is very useful for finding the speed of an object.

When reviewing the statement we can say that it is FALSE

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How much force is needed to accelerate a 20 kg mass at a rate of 4 m/s to the second power?
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Answer:

So 55 Newtons are needed.

6 0
2 years ago
Read 2 more answers
Minority group
Margarita [4]

Answer:

Minority group - People who are singled  out for unequal treatment  and who regard  themselves as objects of  collective discrimination.

Ethnicity - A shared identity based on  cultural elements such as  heritage, language, and  religion.

Majority group - A group's subset that  consists of more than half  of the entire group's  members.

Race - A socially constructed  group of people who share  physical characteristics  that are considered  significant by a society  and that are used to  distinguish them from  other groups.

Explanation:

To better understand the above-mentioned definitions we would use some examples:

Elder people can be considered as a minority group in the United States because of their reduced status as a consequence of popular discrimination and prejudice against them. In contrast to them, young men consisting of more than half the population in the age category is an example of the majority group.

Groups of people like Hispanic Americans, Jews, Italian America, Irish are some examples of people belonging to different ethnic backgrounds residing in the U.S.

African Americans who are distinguished based on their skin color is an example of race.

6 0
3 years ago
A hockey puck slides 55.0 m along the length of the rink in just 1.25 s. The slight friction between the puck and the ice provid
topjm [15]

Answer:

44.8 m/s

Explanation:

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InS = 2(55/1,25) - 43.2

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3 0
2 years ago
An object is represented by the dot on the motion map. Which object is most likely represented by the dot?
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B) I just took the test and put D but it gave me the wrong answer. It told me it was B.

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Because the temperature remains constant, we can apply Boyle's Law which states that 
pV = constant
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By halving the volume, the pressure doubles.

Answer:
The pressure increases by a factor of 2.

7 0
3 years ago
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